FREE WEBSITE SECURITY TOOL
Free SSL Certificate Checker
Check a website's SSL certificate, expiration date, issuer, hostname coverage, and certificate validation status. Identify common HTTPS certificate problems with Hostingcone's free online tool.
Free SSL Check · No Account Required · Certificate Expiration Details
Check a Website’s TLS Certificate
This tool checks the publicly presented certificate for one resolved address on HTTPS port 443. It does not scan every server, test every TLS vulnerability, or establish that a website is safe.
Need Help Fixing an SSL Certificate Error?
Learn how to troubleshoot HTTPS warnings, expired certificates, hostname mismatches, and certificate validation problems.
What Does the SSL Checker Test?
Certificate Expiration
Review the certificate’s start and end dates. Certificates with 30 days or fewer remaining receive a renewal warning; expiration alone does not determine overall validity.
Certificate Issuer
See the issuer reported by the certificate. Trust depends on the chain and the server’s trusted certificate authorities, not merely the issuer’s name.
Hostname Matching
Compare the requested hostname with its Subject Alternative Names, using the Common Name only when SANs are absent. A wildcard covers one matching hostname level.
Certificate Validity
Review trust verification, hostname coverage, and validity dates together. Untrusted details are labelled clearly and are never presented as successful validation.
Certificate Chain
Check whether the connection verifies against this server’s trust store. Failures can involve missing intermediates, an untrusted issuer, or certificate dates.
TLS Connection Information
See the negotiated TLS version when available. A single negotiated connection is not a complete protocol or cipher configuration audit.
How to Check an SSL Certificate
1. Enter the Website Domain
Enter a public hostname, such as example.com or www.example.com. A normal HTTPS URL is accepted; the check always uses port 443.
2. Run the Certificate Check
The server resolves the hostname safely and attempts a TLS connection. Short-term caching and request limits help keep the free tool available.
3. Review the Results
Check the status, expiration, hostname coverage, and chain result. Use the recommended next steps to investigate warnings without bypassing browser protections.
Common SSL Certificate Problems
Expired Certificate
Renew or replace the certificate and confirm the current certificate is installed on the correct HTTPS endpoint.
Hostname Mismatch
The certificate may cover a different name. Check the exact hostname, including www or another subdomain, and install a certificate covering it.
Untrusted Certificate Authority
A self-signed or privately issued certificate may not be trusted by public browsers. Confirm the intended trust model and use a trusted issuer for a public website.
Incomplete Certificate Chain
The server may not present required intermediate certificates. Review the issuer’s installation guidance and the hosting platform’s chain configuration.
Certificate Not Yet Valid
Check the certificate’s start date and device/server clocks. A replacement may have been installed before its validity period began.
HTTPS Connection Failure
DNS, firewalls, server availability, or TLS configuration can prevent a connection. A connection failure does not prove a certificate is expired.
Results describe the sampled connection. Load-balanced servers, IPv4 and IPv6 destinations, regional routing, and different browser trust stores may produce different results.
SSL Certificates Explained
“SSL certificate” is the common name for the certificate used by modern HTTPS connections, which use TLS. The certificate helps a client authenticate the hostname, while TLS encrypts data exchanged over the connection.
A valid certificate does not guarantee that a website is free from malware, misleading content, or other security risks. Keep website software maintained and assess security separately.
This checker reports a point-in-time result from the Hostingcone server. It does not promise uninterrupted HTTPS availability or replace monitoring and browser diagnostics.
Hostingcone SSL and Website Services
Explore certificate options for your website, or get help investigating website configuration and maintenance issues. Service scope depends on the product or work agreed.
Frequently Asked Questions
How do I check if an SSL certificate is valid?
Enter the exact hostname and review trust verification, hostname matching, and validity dates together. A successful result applies to the sampled connection and this server’s trust store.
How can I check when an SSL certificate expires?
Read the expiration date and days remaining in the results. Dates use UTC. A warning appears at 30 days or fewer, and a passed expiration date is labelled expired.
Why does my browser say a certificate is not trusted?
Possible causes include an untrusted issuer, a missing intermediate certificate, expired dates, or a local trust-store problem. Compare the exact browser warning with the chain result before changing configuration.
What causes an SSL hostname mismatch?
The requested hostname is not covered by the certificate. Common examples include a certificate for the root domain that omits www, or a server presenting a certificate for another website.
Is a free SSL certificate secure?
A properly issued, trusted, and configured free certificate can provide TLS encryption and hostname authentication. Price alone does not determine encryption strength; validation type, support, and management features can differ.
How often should I check my certificate?
Check after installation, renewal, hosting changes, and before expiration. For ongoing awareness, use monitoring appropriate to your website rather than relying solely on occasional manual checks.
Can a website have HTTPS and still be unsafe?
Yes. HTTPS protects the connection and helps authenticate the hostname. It does not prove that the content is trustworthy or that the website is free from malware or vulnerabilities.
What should I do if my SSL certificate has expired?
Renew or replace it, install it with the required chain, and verify all affected hostnames. Ask your hosting or certificate provider for assistance if deployment or automated renewal has failed.
Keep Your Website Secure and Accessible
Check your SSL certificate, explore Hostingcone's SSL solutions, or get help resolving website configuration issues.